<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>show_filter</title>
</head>
<body>
{{ wd|upper }}
<br>
{{ wd|lower }}
<br>
{{ wd|title }}
<br>
{{ age|add:1 }}
<br>
{{ wd|length }}
<br>
{{ wd|add:" 是我" }}
<br>
{{ wd|title|add:" 是我" }}
</body>
</html>

